Mixing apparatus



R. B. GREY.

MIXING APPARATUS.

APPLICATlON FILED JULY 19. 1920.

1 09,542. Patented Mar- 14,1922.

2 SH EETSSHEET Zia-21 75 2".-

R. B. GREY. MIXING APPARATUS.

APPLICATION HLED lULY 19|l920.

Patented Mar. 14, 1922.

2 SHEETS-SHEET 2,

MIXING APPARATUS.

incense.

Application filed July 19,

To all Quiz-m it may concern n Be it known that I, Iionnar BnnTnAM GREY,a subject of the King of the Unlted Kingdom of Great Britain andIreland, and

residing at London, England, have invented a certain new and usefulImprovement in or Relating to Mixing Apparatus, of which the followingis a specification.

This invention relates to improvements in and connected with mixingapparatus of the vortex type.

In mechanical agitators for mixing liquids, semi-liquids and liquids andsolids, of the type where a blade or blades is or are rotated on avertical shaft and baifle'plates are arranged down the sides of themixing tank, a large amount of power is wasted in overcoming theresistance offered by the baflle plates to the natural rotation of theliquid induced by the revolving blades.

In my invention these side baflies are dispensed with and a plurality ofindependently adjustable breakers or bafiies capable of adjustment toindividually different depths of immersion in the contents of the mixingtank are arranged on the top of the vessel.

This improved arrangement of breakers or baiiies greatly reduces thepower requiredto operate the mixing apparatus and greatly increases theefficiency of the mixing effect. he invention is illustrated in theaccompanying drawing in which Fig. l is a vertical section andFig. 2 aplan of a. mixing apparatus fitted with the improved arrangement ofbreakers or baffles.

As shown, the breakers or baffles (threeare shown) each consists of afiat plate A preferably wider at one end than at the other, said platesbeing supported by rods B passing through the cover C of the mixingapparatus and connected at their upper ends to form a handle D. 'Iherods B are perforated at intervals throughout their length as at E forthe insertion of locking-pins F adapted to bear on upstanding lugs G onthe cover C so as to permit of supporting each ba-file at variousheights within the contents of the tank T. i

In operating the mixing apparatus the Specification 0'. Letters Patent.

PatentedMar. 1a, 1922.

1920. Serial No. 397,254.

shaft L on which are fitted fast and loose pulleys MN. embraced by abelt '(not shown) which is connected to a. suitable; prime mover. Theaction of the breakers or bafiies A breaks up the surface tensioncontinuous streams are returned into the vortex and an agitating effectis setup By reference to Fig. 2 it will be understood that'the bellies,which arejadjustably supported by the cover of the tank, arewidelyseparated fromthe sides of the tank, instead of being closelyadjacent to the sides of the tank as heretofore; so that the waste ofpower in the operation of the mixer, here inbefore referredto, isavoided by the present improved arrangement of the battle plates.

It has been found by experiment that by ad ustment to different depthsof the various battles the agitating ormixing effect of the The depthwhole device can be increased.

of immersion is varied according to the difference in specific gravitiesof thematerials under treatment. 7 j

i The tank '1 is preferably provided with an inverted conical bottom andthe propeller or stirrer H, which is attached to the lower end of thevertical shaft I, is arranged to rotate horizontally within the chamberof the pan aiforded by said conical bottom,'so that an outward andupward flow of the liquid which is being agitated is induced when saidpropeller or stirrer is in oper- The fast and loose pulleys are i of thecontents whereby ation. This fiow'of the liquid is intercepted by thebattles A in the upper part of the mixing chamber, so that the saidbafiles cooperate with the said rotating propeller or stirrer in themixing operation. These baffies A have outwardly and upwardly inclinedlower edges to induce an inward and downward flow of the liquid toassist in the outward and upward flow of the liquid induced by rotatingthe propeller or stirrer.

Although I have shown an arrangement for manual independent adjustmentof the battles it is clearthat the battles maybe adjusted independentlyof one another by mechanioal'means.

I claim: V

1. In a mixing apparatus, the combination with a tank provided with acover, of battles adjustably supported by said cover and dependingtherefrom into the upper v 7 part of the chamber of said tank, saidbaf-v the tank and consisting of fiat plates the lower edges of whichare above the vertical middle part of the said tank.

2. In a mixing apparatus, the combination with a tank provided with acover, of bafiie-s adjustably supported by said cover and dependingtherefrom into the upper part of the chamber of said tank, said bafliesbeing widely separated from the sides of the tank and consisting of flatplates which are so arranged as to be widely separated from the walls ofthe tank, said plates having outwardly and upwardly inclined loweredges.

3. In a mixing apparatus, the combination with a tank, of a cover onsaid tank, a propeller rotatable in said tank, a plurality of baflies insaid tank, said baffles presenting plane surfaces, pairs of supportingrods connected to said battles and extending through said cover, saidrods being each provided with a series of spaced perforations, a handleconnecting the rods of each pair above said cover, and locking pinsadapted for nsertion in selected perforations so as to sustain saidbatlles at selected elevations.

4. In a mixing apparatus, the combination with a tank provided with acover and having an inverted conical bottom, of a vertical shaft, ahorizontally arranged stirrer attached to the bottom of said shaft andro tating horizontally within the chamber of said bottom, and bafliesadjustably sus pended from said cover and disposed in the upper part ofthe chamber of the said tank and with which baffles said stirrercooperates.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT BERTRAll I GREY. V I

Witnesses JOHN J. JENKINS, ELsm L. TURNER.

